The volatile esters components were determined by gas chromatographic method and the influence of malt proportion,oxygen circulation rate and fermentation conditions(temperature,pressure,rate) on volatile esters formation was studied.The results showed that contents of ethyl acetate and isoamyl acetate both significantly increased when malt proportion increased from 55% to 65%,but reduced 9.8% and 3.4% respectively when oxygen circulation rate increasing from 8 m3/h to 10 m3/h.The contents of volatile esters increased as fermentation temperature got higher and decreased as fermentation pressure got higher.In addition,there existed negative correlation between pre-fermentation time and esters content.